[dconf: 6/6] Merge branch 'bug/multi-sub' into 'master'

[Daniel Playfair Cal <danielplayfaircal src gnome org>]

commit 0233128a0366629e7445e9e2b6d79ec91a858a7e
Merge: 060b9a1 8760833
Author: Daniel Playfair Cal <daniel playfair cal gmail com>
Date:   Mon Aug 13 23:49:08 2018 +0000

    Merge branch 'bug/multi-sub' into 'master'
    
    Engine: account for multiple simultaneous subscriptions to the same path
    
    Closes #2
    
    See merge request GNOME/dconf!5

 engine/dconf-engine.c            | 253 +++++++++++++++++++++++++++----------
 engine/dconf-engine.h            |  11 --
 gsettings/dconfsettingsbackend.c |   1 +
 tests/engine.c                   | 260 +++++++++++++++++++++++++++++++--------
 4 files changed, 400 insertions(+), 125 deletions(-)
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